RACIST SERENA CARTOON NEWSPAPER DOUBLES DOWN ... Attacks 'PC' Critics

We're NOT racist, you're too sensitive -- that's how an Australian newspaper is handling criticism of their Serena Williamscartoon ... and now they've REPRINTED IT on their cover.

The Herald Sun ran the headline, "Welcome To PC World" -- along with the caption, "If the self-appointed censors of Mark Knight get their way on his Serena Williams cartoon, our new politically correct life will be very dull indeed."

Along with reprinting Serena, the paper added other "controversial" cartoons from the artist including a chubby Kim Jong-unand a villainous Donald Trump.

Under the Serena cartoon, they noted the public "vetoed" the image due to "large hair and lips, too angry."

They mockingly noted the paper would now be a "Satire Free Zone."

What the paper is failing to acknowledge is how racists used cartoons featuring exaggerated lips, hair, noses and other features to mock and dehumanize black people for centuries.